Drug interactions
Hydrochlorothiazide-telmisartan + Penbutolol
Severity: Minor
Hydrochlorothiazide-telmisartan and Penbutolol: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Penbutolol is a beta-blocker, and combined with telmisartan and hydrochlorothiazide gives additive blood pressure lowering, which is often therapeutically useful. Beta-blockers can mask hypoglycemia symptoms, and thiazides can worsen glucose control in diabetic patients.
What this interaction means in plain words
Hydrochlorothiazide-telmisartan and Penbutolol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Additive antihypertensive effect from different mechanisms; beta-blockade can mildly raise potassium while the thiazide lowers it.
What to do
Monitor blood pressure and heart rate, and check potassium and glucose in diabetic patients. No dose change is usually required.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Hydrochlorothiazide-telmisartan
- Aliskiren + Hydrochlorothiazide-telmisartan Contraindicated
- Dofetilide + Hydrochlorothiazide-telmisartan Contraindicated
- Hydrochlorothiazide-telmisartan + Sparsentan Contraindicated
- Aldesleukin + Hydrochlorothiazide-telmisartan Major
- Amifostine + Hydrochlorothiazide-telmisartan Major
- Amiloride + Hydrochlorothiazide-telmisartan Major
Frequently asked questions
Can I take Hydrochlorothiazide-telmisartan with Penbutolol?
MediHelp rates the interaction as minor. Hydrochlorothiazide-telmisartan and Penbutolol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Penbutolol is a beta-blocker, and combined with telmisartan and hydrochlorothiazide gives additive blood pressure lowering, which is often therapeutically useful. Beta-blockers can mask hypoglycemia symptoms, and thiazides can worsen glucose control in diabetic patients.
How serious is the interaction between Hydrochlorothiazide-telmisartan and Penbutolol?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure and heart rate, and check potassium and glucose in diabetic patients. No dose change is usually required.
What other medicines interact with Hydrochlorothiazide-telmisartan?
MediHelp also lists interactions of Hydrochlorothiazide-telmisartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Hydrochlorothiazide-telmisartan page.
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